SGC Tests for Influence of Material Composition on Compaction Characteristic of Asphalt Mixtures

Compaction characteristic of the surface layer asphalt mixture (13-type gradation mixture) was studied using Superpave gyratory compactor (SGC) simulative compaction tests. Based on analysis of densification curve of gyratory compaction, influence rules of the contents of mineral aggregates of all s...

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Bibliographic Details
Published in:TheScientificWorld 2013-01, Vol.2013 (2013), p.1-10
Main Authors: Chen, Qun, Li, Yuzhi
Format: Article
Language:English
Subjects:
Aggregates
Asphalt
Asphalt pavements
Compaction
Composition
Compressive Strength
Densification
Design
Dynamic testing
Energy
Hardness
Hydrocarbons - analysis
Hydrocarbons - chemistry
Materials
Materials Testing - methods
Mechanical properties
Powder
Researchers
Roads & highways
Stress, Mechanical
Surface layers
Testing
Transportation planning
Workability
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Summary:Compaction characteristic of the surface layer asphalt mixture (13-type gradation mixture) was studied using Superpave gyratory compactor (SGC) simulative compaction tests. Based on analysis of densification curve of gyratory compaction, influence rules of the contents of mineral aggregates of all sizes and asphalt on compaction characteristic of asphalt mixtures were obtained. SGC Tests show that, for the mixture with a bigger content of asphalt, its density increases faster, that there is an optimal amount of fine aggregates for optimal compaction and that an appropriate amount of mineral powder will improve workability of mixtures, but overmuch mineral powder will make mixtures dry and hard. Conclusions based on SGC tests can provide basis for how to adjust material composition for improving compaction performance of asphalt mixtures, and for the designed asphalt mixture, its compaction performance can be predicted through these conclusions, which also contributes to the choice of compaction schemes.
ISSN:2356-6140
1537-744X
1537-744X
DOI:10.1155/2013/735640